trues, last time matte screen is really dull the color. but not for today. recent line up, is some sort of semi-glossy. close to glossy beauty but still under matte categories. why glossy is not for photo editing? coz glossy coating is like  "adding" or improve and crispy the display, and we will miss-judge the origin color of picture. this is my personal experience, the photo editing done on glossy monitor, very satisfied. but when move to friend's monitor and other display, complaint why my photo editing so    all color range gone...
yes, the best is we have matte screen for editing, once done, drag to glossy monitor to see again will be perfect. (left matte, right glossy)
that's correct, movie or gaming can take glossy screen, are still fine. why not for photo editing? take Dell monitor as example,  glossy monitor like S2340L, the color gamut specs are low. professional at least get P series and best go for UltraSharp. which offer much better color gamut, more accuracy and standard of ARGB and sRGB.